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Disclosures About Fair Value Of Financial Instruments (Fair Value Of Financial Assets And Liabilities On A Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 28, 2012
Jan. 28, 2012
Apr. 30, 2011
Level 1 [Member] | Executive Savings Plan Investments [Member]
     
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]      
Fair value measured on recurring basis, Assets $ 91,391 $ 81,702 $ 82,826
Level 2 [Member] | Short-Term Investments [Member]
     
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]      
Fair value measured on recurring basis, Assets 174,872 94,691 85,349
Level 2 [Member] | Foreign Currency Exchange Contracts [Member]
     
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]      
Fair value measured on recurring basis, Assets 7,704 6,702 7,142
Fair value measured on recurring basis, Liabilities 9,415 4,217 33,967
Level 2 [Member] | Diesel Fuel Contracts [Member]
     
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]      
Fair value measured on recurring basis, Assets $ 3,216 $ 1,698 $ 2,008